<template>
    <div>
<!-- 面包屑导航区 -->
<el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>数据统计</el-breadcrumb-item>
    <el-breadcrumb-item>数据报表</el-breadcrumb-item>
</el-breadcrumb>
<el-card>
    <!-- 2，为ECharts准备一个具备大小（宽高）的Dom -->
    <div id="main" style="width: 800px;height:600px;"></div>
</el-card>
    </div>
</template>

<script>
// 1，导入echarts
const echarts = require('echarts')
import _ from 'lodash'

export default {
    data(){
        return{
            // 需要合并的数据
            options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
            ]
            } 
        }
    },
    created(){},
    // 只要执行到mounted，表示页面上的元素已经被渲染完毕了。
   async mounted(){
        // 3，基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        // 发起请求获取数据
        const{data:res} =  await this.$http.get('reports/type/1')
        if(res.meta.status !== 200){
            return this.$message.error('获取折线图数据失败')
        }


        // 4，准备数据和配置项
       const result =  _.merge(res.data,this.options)

        // 5，展示数据
        myChart.setOption(result);
    },
    methods:{

    },
}
</script>

<style lang="less" scoped>

</style>